Substantia innominata

The substantia innominata, also innominate substance or substantia innominata of Meynert, is a series of layers in the human brain consisting partly of gray and partly of white matter, which lies below the anterior part of the thalamus and lentiform nucleus. It is included as part of the anterior perforated substance. It is part of the basal forebrain structures and includes the nucleus basalis. A portion of the substantia innominata, below the globus pallidus is considered as part of the extended amygdala.

This keyword could refer to multiple things. Here are some suggestions: